package com.atguigu.gulimall.seckill.schedule;

import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * @Author : Jungle
 * @Description :
 *      秒杀商品的定时上架
 *      每天晚上3点:上架最近三天需要秒杀的商品。
 *         今天   00:00:00 - 23:59:59
 *         明天  00:00:00- 23;59;59
 *         后天   00:00:00 - 23:59:59
 */
@Slf4j
@Service
public class SeckillSkuScheduled {
    @Autowired
    private SeckillService seckillService;
    @Autowired
    private RedissonClient redissonClient;

    public static final String upload_lock = "seckill:upload:lock";
    /**
     * todo 幂等性处理
     */
    @Scheduled(cron = "*/20 * * * * ?")
    public void uploadSeckillSkuLast3Day(){
    //  1、重复上架无需处理
        log.info("==>上架秒杀商品信息");
        //分布式锁  锁的业务执行完成，状态已经更新完成，释放以后，其他人获取到就会拿到最新的状态
        RLock lock = redissonClient.getLock(upload_lock);
        try {
            lock.lock(10, TimeUnit.SECONDS);
            seckillService.uploadSeckillSkuLast3Day();
        } finally {
            lock.unlock();
        }

    }
}
